How come water is bubbly when it is boiled?

Answer 1

The bubbles are an indication of the water evaporating, which is it turning into a gaseous state.

EDIT
Old Lady's answer is wrong. Heat cannot cause a compound to be split into pure elements, only through a chemical process can that be acheived. The released gas will condense back into water once its temperature drops

Answer 2

Heating does not break water up into hydrogen and oxygen, it takes electricity to do that.

Boiling is just the phase change from a liquid to gas, just like freezing is the phase change from liquid to solid. The bubbles you see in boiling water are just the water molecules which have turned into gas (water vapor). If you were to keep boiling the water long enough, all of the water molecules will turn into gas, and the pot will be empty.

Answer 3

When you boil water what you're really doing is providing energy and exciting the individual water molecules.

This causes the molecules to speed up and push apart from one another, breaking their hydrogen bonds. (An H-bond is a weak attraction between water molecules due to partial ionic charges, but it's not really important to this question.)

When this happens you get steam (which is vaporized water), and you get the bubbles on the bottom and sides of the water's container. Both the steam and bubbles are water vapor that is trying to escape from the liquid water.

Answer 4

Water is made up of hydrogen and oxygen. Heating breaks the bonds that hold the molecules together and what you see is the free oxygen and hydrogen bubbling up through the water. If you leave the water on the stove, the whole thing will eventually bubble away and you will have a dry pot.

Answer 5

one definition of boiling is that the vapor pressure of a substance equals the vapor pressure of the surrounding. When this happens, the molecules in the water can leave the pot of water just as easy as they remain in the pot of water. Before boiling, the pressure above the water is higher and this keeps the water molecules in the pot.

The bublling that you see is water molecules with high enough velocity (due to energy) to break the top surface as they leave the pool of water.

Answer 6

Preasure